Driving in 2wd with hubs locked

Submitted: Monday, Jan 19, 2004 at 10:35
ThreadID: 9850 Views:5737 Replies:10 FollowUps:6
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hi everyone,
I was wondering if I could drive my 86 4 runner in 2H with the hubs locked so that I dont have to get out to lock them and i just have to throw it into 4H or4L? I liked the idea because it means less effort.... I've been told by a mate that I can do this but i'm worried i'll break something or wear something out. Both front and back diffs are fitted with Lokkas and its a 2.2 5 spd manual. Any help would be appreciated

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Reply By: djr - Monday, Jan 19, 2004 at 11:01

Monday, Jan 19, 2004 at 11:01
I had an 80 series with part time 4wd and it was advised to engage your hubs occasionally without selecting 4wd to keep your hubs lubricated. It doesn't cause any damage and it makes it a lot easier to change into 4wd. Just don't forget to unlock them on the black top drive home.
AnswerID: 43492

Reply By: friar - Monday, Jan 19, 2004 at 11:03

Monday, Jan 19, 2004 at 11:03
Hi SteveW
Yes you can select 4h on the move up to about 60klm an hour with the
hubs engauged,you must stop to engauge 4l ,4h can be disengauged
on the move,if you do not mind a little extra wear,&fuel consumption
you never kneed to disengauge the hubs
AnswerID: 43493

Follow Up By: SteveW - Monday, Jan 19, 2004 at 11:45

Monday, Jan 19, 2004 at 11:45
Thanks guys, i dont think ill be locking them while driving on the black stuff but ill definatly lock them when im driving on dirt, i'm a bit worried about the extra fuel consumption as the 4 runner only has a 60lt tank( i want a long range but dont have the $ for one yet) and that only lasts approx 350km at best, obviously alot less when 4 wheel drivin..
FollowupID: 305772

Reply By: LBJ - Monday, Jan 19, 2004 at 11:27

Monday, Jan 19, 2004 at 11:27
hi stevew, yeah you are goona be ok driving with your hubs locked in. i would be driving on the road with them locked but (you might already know that!). you will use a little more fuel though thats for sure....i suppose if your not wearing anything out then your not using your 4b mate.....just keep it maintained and you should be fine!!
AnswerID: 43496

Reply By: jeff-wa - Monday, Jan 19, 2004 at 12:40

Monday, Jan 19, 2004 at 12:40
All it means is that your front Diff will be being pused around by the front wheels, meaning a minute ammount of extra wear on the front tyres, a little on your front diff (because it's actually being used instead of just sitting there) and therefore slightly lower fuel consumption, probally less than if you had another person in the car. Don't worry about it!
AnswerID: 43504

Reply By: donk - Monday, Jan 19, 2004 at 12:58

Monday, Jan 19, 2004 at 12:58
I have read the other replay & normally i would agree but i believe this 4 runner has a Lokka diff lock in the front as opposed to a normal open front diff & when it is driving the front wheels would be turning the front diff centre causing the diff centre pin to push the dog clutches outward causing the front diff to be in a locked state when driving strait ahead (the pin would be pushed in the opposite direction to normal as the wheels are driving the diff instead of the diff driving the wheels)

I am not confident that the diff would unlock under all conditions when turning & this may cause steering problems ??????? particually as it has a rear lokka fitted as well

I would speak to a lokka diff lock supplier & get there advise on this matter

Regards Don
AnswerID: 43510

Follow Up By: Mark - Monday, Jan 19, 2004 at 16:39

Monday, Jan 19, 2004 at 16:39
I had a Lokka in the front of my 80 series and there is no problem driving with the hubs locked (in 2WD). Did 100,000 plus kms with the lokka like this and never had a problem.

There is NO feedback to the steering as there is no torque being applied by the driveshaft. However, once 4WD is engaged there is noticable effect on steering by the Lokka.

I would normally lock my hubs in at the beginning of a 4WD trip and unlock them when I got home (days later). There is no need to keep locking and unlocking your hubs. The extra fuel consumption is so minute it would not be noticeable. Only need to unlock the hubs for the daily gring during the week before getting away for the 4WDing on the weekend again.


FollowupID: 305795

Follow Up By: Dave from Fraser Coast 4WD Club - Monday, Jan 19, 2004 at 22:16

Monday, Jan 19, 2004 at 22:16
yep with no torque from the tailshaft the Lokka will be unoticeable.

I've got Lockrights front and rear in the Troopy, and get no adverse feedback with hubs in and in 2H.
FollowupID: 305825

Reply By: Member - JohnR - Monday, Jan 19, 2004 at 13:00

Monday, Jan 19, 2004 at 13:00
Guys there is another factor in not having your hubs locked in for a few months and not engaging four wheel drive.

I have had universal joint grease dry out through not being used and warmed. When then happens is your uni joints quickly wear out. Maintenance is utilization too to make sure those bits are used on a reasonably frequent basis, just like your aircon systems. To stop the seals drying out there of courseRegards

JohnR - Not enough of the right travelling, some here..... some over there.......
AnswerID: 43511

Reply By: ross - Monday, Jan 19, 2004 at 20:52

Monday, Jan 19, 2004 at 20:52
Driving with the hubs locked will not make any difference with or without lokkas.The extra fuel consumption will be negilible and not noticable unless it was done under scientifically monitored conditions.Of course over a year or so it would add up in dollar terms.
What a lot of people forget is that pre-1980s there were no free wheeling hubs fitted to any vehicle that I know of except as an aftermarket option until the car companies got on the bandwagon.
AnswerID: 43553

Follow Up By: Member - Karl - Monday, Jan 19, 2004 at 20:58

Monday, Jan 19, 2004 at 20:58
I agree. I used to drive my old 60 Series with the hubs locked all the time and never had a problem, mainly because I would forget to unlock them, in fact I was advised to do it to keep the parts lubed in the diff by allowing them to move around. Got rid of the old girl with just over 490 000 kms on the clock.Everyone is entitled to have an opinion - just make sure that yours is correct.
FollowupID: 305808

Follow Up By: SteveW - Tuesday, Jan 20, 2004 at 11:24

Tuesday, Jan 20, 2004 at 11:24
thanks guys, dont know what i'd do without you. I sent an email to 4wd systems asking them but have not had a response as yet...
FollowupID: 305877

Reply By: Big Trev - Tuesday, Jan 20, 2004 at 13:42

Tuesday, Jan 20, 2004 at 13:42
Has anyone ever done a fuel comparison on the difference between having your hubs turned in or not. I can't tell the difference with mine, so I reckon the fuel consumption variance must be SO small that it is almost immeasurable.

I have noticed that there is NO difference in turning lock when the hubs are in, as against being out. The only time I notice a difference in turning circle is when hubs are in and vehicle is in 4WD.

As for tyres wearing out coz the hubs are in, never heard of that one before. Tyres biggest wear factor is turning unless there is an alignment problem. One U turn eqauls about 16k's of straight road driving. Tyres will wear out over distance and hard driving over harse ground, but with good rotation practices, careful monitoring of tyre pressures and appropriate tyre selection you will normally get good mileage from tyres regardless of whether the hubs are in or out.
AnswerID: 43666

Reply By: snow - Tuesday, Jan 20, 2004 at 14:33

Tuesday, Jan 20, 2004 at 14:33
Gday Steve,
Wow mate the fuel economy aint real flash, is that a diesel or petrol mate?
AnswerID: 43673

Follow Up By: SteveW - Thursday, Jan 22, 2004 at 12:23

Thursday, Jan 22, 2004 at 12:23
its a 2.2 petrol, its been fully rebuilt, the only change is a very very slight lumpier cam..
FollowupID: 306165

Reply By: snow - Thursday, Jan 22, 2004 at 16:13

Thursday, Jan 22, 2004 at 16:13
Strewth Steve thats one thirsty little motor mate.
All the best
AnswerID: 43986

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